Surface Wave Transmission on Outer Surface of Medium

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Solution Overview

Problem

Current wireless infrastructure faces challenges in providing sufficient bandwidth to meet increasing data demands, particularly in urban areas with high usage of smartphones and portable devices, as traditional macrocells struggle to keep pace with demand, and existing systems require higher bandwidth capabilities.

Innovation Solution

A guided wave communication system that utilizes electromagnetic waves propagated along the outer surface of transmission media, such as wires, without relying on electrical return paths, allowing for efficient data transmission over various types of conductors and dielectric materials, including insulated and uninsulated wires, and dielectric transmission media.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional macrocell base stations are used to provide wireless coverage, then coverage area is large, but bandwidth capability is insufficient to meet increasing data demands

Engineering Contradiction:
Improvebandwidth capabilityVSAvoidcoverage area
Core Design Contradiction:
ProductivityVSArea of stationary object

Solution Approach 1:

The patent segments the wireless network into macrocells for broad coverage and small cells (microcells, picocells) for high-bandwidth areas. This segmentation allows the system to simultaneously provide both large coverage areas and high bandwidth capability by deploying different cell types in appropriate locations.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent transitions from traditional two-wire electrical circuit transmission to single-wire surface wave propagation. By changing the dimension of the transmission approach (from requiring return paths to utilizing outer surface propagation), the system achieves higher bandwidth capability without being constrained by traditional circuit limitations.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Loss of energy

If electromagnetic waves are propagated along the outer surface of transmission media, then propagation loss is reduced, but the system requires specialized waveguide structures

Engineering Contradiction:
Improvepropagation lossVSAvoidwaveguide structure
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

The transmission medium itself (wire, cable, or dielectric) serves dual purposes: it functions as both the transmission line and the waveguide structure. The outer surface of these existing structures naturally guides surface waves, eliminating the need for separate specialized waveguide components and reducing overall system complexity.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent makes existing transmission media universal by enabling them to support both traditional electrical signal transmission and new surface wave propagation modes. This multi-functionality allows the same infrastructure to provide both legacy service and high-bandwidth surface wave communication without requiring entirely new structures.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Device complexity

If single-wire transmission lines are used without electrical return paths, then device complexity is reduced, but reliable data transmission becomes challenging

Engineering Contradiction:
Improvetransmission line structureVSAvoiddata transmission reliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent replaces the traditional electrical circuit mechanism (requiring closed loops with return paths) with an electromagnetic surface wave mechanism. Surface waves propagate along the outer surface of the conductor or dielectric, allowing reliable one-way transmission without needing electrical return paths, thus simplifying the transmission line structure while maintaining reliability.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental transmission parameter from electrical current flow requiring closed circuits to electromagnetic surface wave propagation. This parameter change enables open-circuit single-wire transmission by utilizing the different physical characteristics of surface waves, which can propagate along isolated conductors or dielectrics without requiring return paths.

Inventive Principle:
Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution enables reliable and efficient data transmission with reduced propagation loss, supporting multiple transmission paths and allowing for the use of single-wire transmission lines, which can operate as open electrical circuits, thereby addressing bandwidth demands and enhancing network capacity.

Implementation Method 1

generating, by the waveguide system, an electromagnetic wave that propagates along the transmission medium... the first material facilitating propagation of the electromagnetic wave from the first portion of the outer surface of the transmission medium to a second portion of the outer surface of the transmission medium

Methodology Applied
Scientific EffectSurface wave propagation: Surface Acoustic Wave

Data Source

PatentUS11581917B2Method and apparatus adapted to a characteristic of an outer surface of a transmission medium for launching or receiving electromagnetic waves
Publication Date: 2023.02.14 AT&T INTELLECTUAL PROPERTY I L P
  • US11581917B2 patent drawing
  • US11581917B2 patent drawing
  • US11581917B2 patent drawing

AI summary

Aspects of the subject disclosure may include, a system that facilitates receiving a first electromagnetic wave propagating along a transmission medium, detecting, according to the first electromagnetic wave, an obstruction on a first portion of an outer surface of the transmission medium, responsive to the detecting the obstruction, configuring a material to have similar properties to the obstruction, the material being positioned along a second portion of the outer surface of the transmission medium, and generating a second electromagnetic wave that propagates along the transmission medium without relying on an electrical return path to facilitate propagation of the second electromagnetic wave along the transmission medium, the material facilitating propagation of the second electromagnetic wave from the second portion of the outer surface of the transmission medium to the first portion of the transmission medium affected by the obstruction. Other embodiments are disclosed.